The SitePoint PHP blog has a new post from Bruno Skvorc talking about a technology that's growing more and more popular all the time in the PHP ecosystem - HHVM, the virtual machine version of Facebook's HipHop software.

Just over two years have passed since the last post about HHVM by Matt Turland. What changed in that time? Did anything? Let's see just how successful PHP's quest for performance was.

Bruno takes a step back and, for those not sure what the HHVM is, explains the technology a bit and what some of the project's goals are. He talks about its compatibility with current software (like OSes and web servers) and the inclusion of FastCGI support. He also talks about some of the other main issues around the use of the HHVM like: